Re: Mygica T230 DVB-T/T2/C Ubuntu 14.04 (kernel 3.13.0-45) using media_build

[Antti Palosaari <crope@iki.fi>]

On 02/22/2015 11:55 PM, Mauro Carvalho Chehab wrote:
> Em Sun, 22 Feb 2015 23:35:52 +0200
> Antti Palosaari <crope@iki.fi> escreveu:
>
>> Mauro,
>> could you fix your media controller stuff ASAP as I think almost all DVB
>> devices are currently broken. I have got multiple bug reports....
>
> That looks weird... I think the patch adding media controller support
> for the dvb-usb was not merged yet.

hmm, OK. But I have got at least one such report for rtl28xxu driver on 
my mail and there is another report on my blog, which is likely same, 
though there was no log, only report saying it crash when latest media 
build used.


>> On 02/22/2015 03:17 PM, Gert-Jan van der Stroom wrote:
>>> Can someone help me to get a Mygica T230 DVB-T/T2/C working on Ubuntu 14.04
>>> (kernel 3.13.0-45) using media_build.
>>> I succeed doing a build of the media_build, the drivers also load when I
>>> attach the Mygica, but when I try to use it (tvheadend) it crashes:
>>>
>>> [   61.592114] dvb-usb: found a 'Mygica T230 DVB-T/T2/C' in warm state.
>>> [   61.828138] dvb-usb: will pass the complete MPEG2 transport stream to the
>>> software demuxer.
>>> [   61.828279] DVB: registering new adapter (Mygica T230 DVB-T/T2/C)
>>> [   61.847369] i2c i2c-7: Added multiplexed i2c bus 8
>>> [   61.847372] si2168 7-0064: Silicon Labs Si2168 successfully attached
>>> [   61.857024] si2157 8-0060: Silicon Labs Si2147/2148/2157/2158
>>> successfully attached
>>> [   61.857034] usb 1-5: DVB: registering adapter 0 frontend 0 (Silicon Labs
>>> Si2168)...
>>> [   61.857488] input: IR-receiver inside an USB DVB receiver as
>>> /devices/pci0000:00/0000:00:1a.7/usb1/1-5/input/input11
>>> [   61.857541] dvb-usb: schedule remote query interval to 100 msecs.
>>> [   61.857709] dvb-usb: Mygica T230 DVB-T/T2/C successfully initialized and
>>> connected.
>>> [   61.857773] usbcore: registered new interface driver dvb_usb_cxusb
>>>
>>> Tvheadend start:
>>> [  314.356162] BUG: unable to handle kernel NULL pointer dereference at
>>> 0000000000000010
>>> [  314.356202] IP: [<ffffffffa02ef74c>]
>>> media_entity_pipeline_start+0x1c/0x390 [media]
>>
>>
>> ^^^^^^^^^^^^ problem is that I think
>>
>>
>>> [  314.356236] PGD 76c6c067 PUD 766b0067 PMD 0
>>> [  314.356260] Oops: 0000 [#1] SMP
>>> [  314.356279] Modules linked in: si2157(OX) si2168(OX) i2c_mux
>>> dvb_usb_cxusb(OX) dib0070(OX) dvb_usb(OX) dvb_core(OX) rc_core(OX) media(OX)
>>> snd_hda_codec_analog gpio_ich hp_wmi sparse_keymap coretemp kvm_intel kvm
>>> serio_raw snd_hda_intel i915 lpc_ich snd_hda_codec shpchp drm_kms_helper
>>> snd_hwdep snd_pcm snd_page_alloc snd_timer pl2303 video wmi tpm_infineon drm
>>> mac_hid mei_me snd soundcore i2c_algo_bit usbserial mei lp parport psmouse
>>> e1000e floppy ptp pps_core pata_acpi
>>> [  314.356541] CPU: 1 PID: 1053 Comm: kdvb-ad-0-fe-0 Tainted: G        W  OX
>>> 3.13.0-45-generic #74-Ubuntu
>
> Gert-Jan,
>
> Could you please post the stack dump? It would help to know what's calling
> media_entity_pipeline_start.
>
> Regards,
> Mauro
>
>>>
>>> What is wrong, or do I miss something ?
>>> I also added the firmware described at:
>>> http://www.linuxtv.org/wiki/index.php/Geniatech_T230
>>
>> regards
>> Antti
>>

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